Merge "Return frame period from vsynctracker." into tm-dev am: 4d035493 am:...

Merge "Return frame period from vsynctracker." into tm-dev am: 4d035493 am: 90f91173 am: 5945161b am: c3ae4145

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/17699150



Change-Id: I1e1a860dcf611dcd07a36d5a221dba06517213c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>